#include<bits/stdc++.h>
using namespace std;
int main(){
    int count = 0;
    vector<int> day = {1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 3, 4};
    for(int i=1;i<=12;i++){
        for(int j=0;j<day.size();j++){
            if(i == 2 && j > 27){
                break;
            }
            
            else if(i == 4 && j > 29 || i == 6 && j > 29 || i == 9 && j > 29 || i == 11 && j > 29){
                break;
            }
            
            else if(i == day[j]){
                count++;
            }
        }
    }
    cout << count << endl;
}